Medion Akoya E7218 Replacement Battery 14.4V 4400mAh

Medion Akoya E7218 Series — 14.4V Li-ion Replacement Battery (BTP-DOBM)

This 14.4V, 4400mAh (63.36Wh) Li-ion battery replaces the original cell in the Medion Akoya E7218 and compatible Akoya notebook models. It fits the E7218, P7624, P7812, and MD98680 among others. OEM part numbers covered include BTP-DOBM, BTP-DNBM, 40036340, 40036339, 40036343, 604N00T011140, and 604N00T011107.

• Akoya E7218 / P7624 / P7812 platform fit: These models share a common 14.4V battery rail, identical connector pinout, and the same BMS handshake protocol — which is why a single cell covers all of them without modification or adapter.
• Bench tested on actual hardware: We ran this cell through full charge and load cycles on the Akoya platform. The BMS communicated correctly with the EC, reported accurate state-of-charge data, and held cutoff voltage without dropping early under combined CPU and display load.
• Post-install calibration on the Akoya EC: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning the embedded controller flags after every cell swap.

BIOS reporting poor battery health immediately after swapping the Akoya cell

The Akoya's embedded controller reads health data from the battery's EEPROM rather than measuring the new cell directly. When you swap the physical cell, the EEPROM still carries cycle count and wear data from the old battery, so the BIOS flags poor health even though the new cell is full capacity. Running one complete discharge-to-hibernate followed by an uninterrupted full charge forces the EC to rewrite its learn cycle data against the new chemistry. After one or two full cycles the health reading corrects itself without any firmware changes needed.

Akoya laptop shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. The old calibration data causes the OS to misread remaining capacity, and the laptop hits the hardware low-voltage cutoff before the display gauge reaches zero. It is not a fault with the replacement cell — it is a calibration lag. Let the battery discharge fully to hibernate-cutoff twice in a row, each time followed by a complete uninterrupted charge to 100%. By the third cycle the fuel gauge IC aligns to the new cell and the shutdowns stop. Confirm the pack is sitting at or above 12.8V at the reported 20% point before concluding the cell itself is faulty.